This lab gave us quick knowledge of ground/power symbols, and schematic symbols for those inckuign the potentiometer. A potentiometer is a variable resistor, 3 terminals, 2 of which is the full resistance, while the 3rd terminal(typically in the center) is the wiper that selects a resistance in between. Experimented with LED brightness by changing the resistance. The answer is current! The voltage drop at the LED will not change, but the voltage left over must all be dissipated by the resistor. That combined with ohms law will give us current, which since this is a series circuit, will all pass through the LED. The more current, the brighter the LED will be...except of the current rating gets exceeded, then the LED will blowup....literally!
 |
Pic above: 3 LEDs with 3 different resistors
|
 |
| Pic above: LED in series with a LDR |
No comments:
Post a Comment